Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template

Abstract:
Graphene, an allotrope of carbon, discovered more than a decade ago has led to myriad research that seeks to unlock its vast potential. Zeolites, commonly used microporous solid catalysts in the petrochemical industry, have recently attracted attention in the field of material science as a template for carbon synthesis. Each individual crystal is distinguished by its unique 1 nanometer (nm) sized pore structure, this structure facilitates the accommodation of carbon nanotubes inside the zeolite. On paper, these nanoporous systems are an ideal template for the synthesis of three-dimensional (3D) graphene architecture but the zeolite pores are too small to accommodate bulky molecular compounds like polyaromatic and furfuryl alcohol that are often used in carbon synthesis. Small molecules like ethylene and acetylene can be used as a carbon source to achieve successful carbonization within the zeolite pores, but it comes at a great cost. The high temperatures required for the synthesis cause the reactions to occur non-selectively on the external surfaces of the zeolite as well as the internal pore walls, resulting in coke deposition and consequently causing serious diffusion limitations in the zeolite pores.



Credit: Institute for Basic Science

Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template

Daejeon, Korea | Posted on July 1st, 2016

IBS Problem Solving

The team from the IBS Center for Nanomaterials and Carbon Materials solved this conundrum with a novel approach. First author Dr. KIM Kyoungsoo explains: "Zeolite-template carbon synthesis has existed for a long time but the problem with temperatures has foiled many scientists from extracting their full potential. Here, our team sought to find the answer by embedding lanthanum ions (La3+), a silvery-white metal element, in zeolite pores. This lowers the temperature required for the carbonization of ethylene or acetylene. Graphene-like sp2 carbon structure can be selectively formed inside the zeolite template, without carbon deposition at the external surfaces. After the zeolite template is removed, the carbon framework exhibits the electrical conductivity two orders of magnitude higher than amorphous mesoporous carbon, which is a pretty astonishing result. This highly efficient synthesis strategy based on the lanthanum ions renders the carbon framework formation in pores with less than 1 nm diameter as easily reproducible as in mesoporous templates, and thus provides a general method to synthesize carbon nanostructures with various topologies corresponding to the zeolite pore topologies, such as FAU, EMT, beta, LTL, MFI and LTA. Also, all the synthesis can be readily scaled up which is important for practical applications - batteries, fuel storage and other zeolite-like catalyst supports."

The IBS team began their experiment by utilizing La3+ ions. Dr. KIM elucidates why this silvery-white element proved so beneficial to the team, "La3+ ions are unreducible under carbonization process condition, so they can stay inside the zeolite pores instead of moving to the outer zeolite surface in the form of reduced metal particle. Within the pores, they can stabilize ethylene and the pyrocondensation intermediately to form a carbon framework in zeolite."

To test this hypothesis the team compared the amount of carbon deposited in La3+-containing form of Y zeolite (LaY) sample against a host of other samples such as NaY and HY. The experimental results indicate that all the LaY, NaY and HY zeolite samples show rapid carbon deposition at 800C. However, as the temperature decreases, there appears to be a dramatic difference between the different ionic forms of zeolite. At 600C, the LaY zeolite is still active as a carbon deposition template. In contrast, both NaY and HY lose their carbon deposition functions almost completely.

Future Application for Zeolite Synthesis

The results, according to their paper published in Nature, highlight a catalytic effect of lanthanum for carbonization. By making graphene with 3D periodic nanoporous architectures, it promises a wide range of useful applications such as in batteries and catalysts but due to the lack of efficient synthetic strategies, such applications have not yet been successful. By taking advantage of the pore-selective carbon filling at decreased temperatures, the synthesis can readily be scaled up for studies requiring bulk quantities of carbon; in particular high electrical conductivity, which is a highly sought aspect for the production of batteries.

####

For more information, please click here

Contacts:
Dahee Carol Kim

82-428-788-133

Copyright © Institute for Basic Science

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

Graphene/ Graphite

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Wrinkles give heat a jolt in pillared graphene : Rice University researchers test 3-D carbon nanostructures' thermal transport abilities November 2nd, 2017

Graphene enables high-speed electronics on flexible materials: A flexible terahertz detector has been developed by Chalmers using graphene transistors on plastic substrates. It is the first of its kind, and may open for applications requiring flexible electronics such as wireless October 31st, 2017

News and information

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

The stacked color sensor: True colors meet minimization November 16th, 2017

Nanometrics to Participate in the 6th Annual NYC Investor Summit 2017 November 16th, 2017

Videos/Movies

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

Graphene enables high-speed electronics on flexible materials: A flexible terahertz detector has been developed by Chalmers using graphene transistors on plastic substrates. It is the first of its kind, and may open for applications requiring flexible electronics such as wireless October 31st, 2017

Zeolites

Dendritic fibrous nanosilica: all-in-one nanomaterial for energy, environment and health November 4th, 2017

Chemistry

Dendritic fibrous nanosilica: all-in-one nanomaterial for energy, environment and health November 4th, 2017

Discoveries

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

The stacked color sensor: True colors meet minimization November 16th, 2017

Counterfeits and product piracy can be prevented by security features, such as printed 3-D microstructures: Forgeries and product piracy are detrimental to society and industry -- 3-D microstructures can increase security -- KIT researchers develop innovative fluorescent 3-D stru November 15th, 2017

Announcements

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

The stacked color sensor: True colors meet minimization November 16th, 2017

Nanometrics to Participate in the 6th Annual NYC Investor Summit 2017 November 16th, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Math gets real in strong, lightweight structures: Rice University researchers use 3-D printers to turn century-old theory into complex schwarzites November 16th, 2017

The stacked color sensor: True colors meet minimization November 16th, 2017

Counterfeits and product piracy can be prevented by security features, such as printed 3-D microstructures: Forgeries and product piracy are detrimental to society and industry -- 3-D microstructures can increase security -- KIT researchers develop innovative fluorescent 3-D stru November 15th, 2017

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Dendritic fibrous nanosilica: all-in-one nanomaterial for energy, environment and health November 4th, 2017

New Atomic Force Microscope to study piezoelectrics at the nanoscale October 29th, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

On the road to fire-free, lithium-ion batteries made with asphalt October 12th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project